An important equation for high school chemistry compulsory one

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1. Calcium oxide reacts with water: Cao + H2O = Ca(OH)2

2. Iron oxide reacts with hydrochloric acid: Fe2O3 + 6HCl = 2FeCl3 + 3H2O

3. Alumina reacts with hydrochloric acid: Al2O3 + 6HCl = 2AlCl3 + 3H2O

4. Alumina reacts with sodium hydroxide solution: Al2O3 + 2NaOH = 2Naalo2 + H2O

5. Reaction of ferric chloride with sodium hydroxide solution: FeCl3 + 3NaOH = Fe(OH)3 3NaCl

6. Ferrous sulfate reacts with sodium hydroxide solution: FeSO4 + 2NaOH = Fe(OH)2 Na2S

The chemistry equation is as follows:1. Sodium reaction with water (floating, melting, swimming, ringing, red): 2na+2h o 2h o+h 2na+2h o 2na+ 2oh +h.

2. Add soda ash solution dropwise in hydrochloric acid: Na2CO3+2HCl 2NaCl+Ho CO2; co32⁻+2h＋ ＝h2o+ co2↑。

3. Iron burns violently in chlorine: 2Fe + 3Cl == ignition] 3FeCl3.

4. Heating reaction between iron and sulfur: Fe+S== [Heating] Fes.

5. Fe 6Hno3==[Heating] Fe(NO3)3 3NO 3HO.

The chemistry equation is as follows:

1. Aluminum and hydrochloric acid: 2Al+6HCl=2AlCl3+3H2 gas.

2. Aluminum and sulfuric acid: 2Al+3H2SO4=Al2(SO4)3+3H2 gas.

3. Aluminum and sodium hydroxide: 2Al+2NaOH+H2O=2Naalo2+3H2 gas.

4. Aluminum hydroxide heating is divided into 2AL (OH) 3 = (heating) AL2O3 + H2O.

5. Aluminum sulfate and ammonia: Al2(SO4)3 6NH3, H2O 2AL(OH)3 precipitation 3(NH4)2SO4.

6. Alumina and hydrochloric acid: Al2O3 6HCl=2ALCL3+3H2O.

7. Alumina and sodium hydroxide: Al2O3+2NaOH=2Naalo2+H2O.

8. Aluminum chloride and sodium hydroxide: AlCl3 + 3NaOH = Al(OH)3 precipitation + 3NaCl.

9. Aluminum hydroxide and sodium hydroxide: Al(OH)3 NaOH=Naalo2+2H2O.

10. Aluminum chloride and sodium hydroxide: AlCl3+4NaOH=Naalo2+2H2O.

All the equations for the first compulsory course of senior one chemistry are as follows:

1. Sodium metal.

The chemical equation that is thrown into a solution of copper sulfate.

2na+2h2o=2naoh+h2↑

CuSO4+2NaOH = Cu(OH)2 Na2SO4 (bubbles first and then blue precipitate).

2. The chemical equation of sodium metal and hydrochloric acid: 2Na+2HCl=2NaCl+H2

3. Sodium hydroxide.

The chemical equation for the metamorphism of the square in the air:

2naoh+co2=na2co3+h2o

na2co3+10h2o=na2co3·10h2o

4. Oxidation of sodium metal in air: 4Na+O2=2Na2O (silvery-white darkening).

5. Sodium metal is burned in air: 2Na + O2 = Na2O2δ (to generate light yellow powder).

6. Sodium peroxide.

Deterioration in the air:

2na2o2+2h2o=4naoh+o2↑

2na2o2+2co2=2na2co3+o2

7. Reaction between sodium peroxide and acid: 2Na2O2+4HCl=4NaCl+2H2O+O2

8. Sodium oxide deteriorates in the air

na2o+h2o=2naoh

na2o+co2=na2co3

9. Reaction between sodium oxide and acid: Na2O+2HCl=2NaCl+H2O

10. Sodium oxide burns in air: 2Na2O+O2=2Na2O2

11. Chlorine.

The equation for reaction with iron: 2Fe + 3Cl2 = 2FeCl3 ignition (reddish-brown smoke).

12. The reaction equation between chlorine and copper: Cu+Cl2=CuCl2 ignition (brownish-yellow smoke).

13. The reaction equation between chlorine and hydrogen: Cl2 + H2 = 2HCl ignition (pale flame, white mist is generated).

14. The reaction equation between chlorine and sodium element: 2Na + Cl2 = 2NaCl ignition (light yellow smoke).

15. Industrial bleaching:

2Cl2+2Ca(OH) 2=CaCl2+Ca(CL) 2+2H2O (is Ca(OH)2 lime milk.

16. The equation between chlorine and water: Cl2+H2O=HCl+HCl

17. Disinfect and dispose of excess chlorine and make 84 disinfectant.

cl2+2naoh=naclo+nacl+h2o

18. Sodium hypochlorite.

Deterioration in the air:

2naclo+co2+h2o=2hclo+na2co3

naclo+co2+h2o=hclo+nahco3